A method of constructing a near-natural complex waterfront ecological zone by using silt/waste residue

Abstract

The invention discloses a method for constructing an ecological zone close to the natural complex waterfront by using the combination of silt / waste residue, 1) making a water filter cofferdam on the periphery of the conversion ditch, making an ecological concrete protective enclosure and planting wet plants on the outside of the cofferdam; Sludge pretreatment; 3) Throw the silt into the cofferdam, then insert a biodegradable filter planting filler tube into the silt and plant plants; 4) During the placement of the silt clumps, part of the silt seepage flows out through the cofferdam and passes through the wet The raw plants are filtered and purified; part of the silt seeps into the planting filler tube and then pumped away; 5) As time goes by, the sludge gradually dries up, and the biodegradable filter planting filler tube gradually degrades, and the plants grow rapidly to cover the entire transformation ditch. The invention solves the problem of nearby disposal of dredging sludge, and at the same time solves the problem of resource utilization of other industrial waste residues, forms a near-natural complex water bank ecosystem, and greatly improves the ecological and landscape functions of the river bank.

Description

technical field [0001] The invention belongs to the field of waterfront construction and environmental protection, and in particular relates to a method for constructing a near-natural and complex waterfront ecological belt by combining mud / waste residue. Background technique [0002] With the increasing pressure of environmental protection, the problem of dredging sludge having nowhere to go is becoming more and more obvious. A more realistic idea is to convert dredging sludge with low harmful components into garden soil near the banks of rivers and lakes. Planting plants to green the banks of rivers and lakes will correspondingly face problems such as the stability of river and lake embankments, odor, leaching water purification, surface runoff scour, drying speed, conversion of silt into soil, and plant selection. [0003] At present, for a long period of time, dredging and demolition wastes of old rivers and lakes coexist and there is no place for landfill. The depressio...

AI Technical Summary

Problems solved by technology

After the traditional use of cement, lime, and gypsum to solidify the sludge, it is difficult to green the sludge with high salinity and alkalinity. The relatively new achievements in this field are "a construction method for high-concentration dredging and highly dehydrated sludge that does not use storage yards", Zhu Wei etc., Publication No.: CN102433906A utilizes high-pressure gas and sludge mixed conveyance-the method of pressing dewatering to improve dredging sludge dewatering capacity, effectively avoids the doping of saline-alkaline additives, is conducive to afforestation, and theoretically if using Oxygen can also deodorize as a high-pressure gas, but the equipment investment is high, and it cannot be used when the sludge contains a large number of masonry fragments; the traditional sludge yard greening needs to wait until the sludge is approximately dry, under the action of microorganisms and oxygen, from the pioneer plant It usually takes a few years to start to implement gradually. During this period, it is difficult to solve the odor pollution of sludge and the pollution caused by heavy rain, and it is difficult to implement on the riverbank where there are many human activities.

[0006] The river and lakeside green belt is a key area for dealing with non-point source pollution. It is usually a soil-grass-shrub-arbor belt with a high density of vegetation. It can intercept river and lake surface runoff sewage and solid waste from entering rivers and lakes. It also has the function of slope protection. At present, foreign soil and terrestrial plants are basically used for construction. The cost is high, and the heterogeneity of the formed ecosystem is poor, which is different from the naturally formed waterfront transitional ecosystem.